IPA: /ɪˈfɛktər/
KK: /ɪˈfɛktər/
A person or thing that produces a particular effect or result.
The effector in the experiment was responsible for the observed changes in the data.
Effecter → It is formed from "effect" (from Latin "effectus", meaning result or outcome) and "-er" (meaning a person who). An effecter is a person who brings about a result or outcome.
Think of someone who causes a result or outcome — that's what an effecter does.